<header class="navbar navbar-default app-header">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <div class="navbar-brand">
        <a ui-sref="home" class="logo-container">
          <span class="master-title">首页</span>
        </a>
      </div>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <ul class="nav navbar-nav">
          <li><a ui-sref="about" class="navbar-nav-link">关于</a></li>
      </ul>
    </div><!--/.nav-collapse -->
  </div>
</header>